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Summary: Ctors | Methods | Inherited Methods

# MediaRouter.VolumeCallback

`public static abstract class MediaRouter.VolumeCallback`
`extends Object` ``

java.lang.Object
↳ | android.media.MediaRouter.VolumeCallback

Interface for receiving events about volume changes. All methods of this interface will be called from the application's main thread.

A VolumeCallback will only receive events relevant to routes that the callback was registered for.

See also:

- `MediaRouter.UserRouteInfo.setVolumeCallback(VolumeCallback)`

## Summary

### Public constructors
`VolumeCallback()`

### Public methods
`abstract void` | `onVolumeSetRequest(MediaRouter.RouteInfo info, int volume)` Called when the volume for the route should be set to the given value
`abstract void` | `onVolumeUpdateRequest(MediaRouter.RouteInfo info, int direction)` Called when the volume for the route should be increased or decreased.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### VolumeCallback

    public VolumeCallback ()

## Public methods

### onVolumeSetRequest

    public abstract void onVolumeSetRequest (MediaRouter.RouteInfo info,
                    int volume)

Called when the volume for the route should be set to the given value

Parameters
`info` | `MediaRouter.RouteInfo`: the route affected by this event
`volume` | `int`: an integer indicating the new volume value that should be used, always between 0 and the value set by `UserRouteInfo#setVolumeMax(int)`.

### onVolumeUpdateRequest

    public abstract void onVolumeUpdateRequest (MediaRouter.RouteInfo info,
                    int direction)

Called when the volume for the route should be increased or decreased.

Parameters
`info` | `MediaRouter.RouteInfo`: the route affected by this event
`direction` | `int`: an integer indicating whether the volume is to be increased (positive value) or decreased (negative value). For bundled changes, the absolute value indicates the number of changes in the same direction, e.g. +3 corresponds to three "volume up" changes.

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